NEW BRUNSWICK SCIENTIFIC BioFlo 4500, Manual To Operations

Page: 156 / 214

BioFlo 4500 M1254-0050 User’s Guide
156
The status of the alarm will change to indicate the current condition of the
alarm for the loop. The alarm status will display
DISABLED
,
NORMAL
,
HIGH
or
LOW . DISABLED
will appear when the alarm feature is off.
NORMAL
will
appear when the loop conditions fall within the loop limits for the alarm.
When an alarm condition exists,
HIGH
appears if the condition is above the
normal limit, and
LOW
appears if the condition is below the normal limit.
24.1.1 Alarm Mode
Before setting alarm limits, choose the desired
ALARM MODE
. There are
two possible selections:
•
ABSOLUTE The alarm will trigger when the
Current value of the control loop
falls below the low alarm limit
or rises above the high alarm limit.
•
DEVIATION This means Setpoint Deviation.
If the Current value of the control
loop falls below the specified increment
from the lower limit setpoint value
or rises above the specified increment
in the high limit, an alarm will be
triggered
The default value of the
ALARM MODE
is
ABSOLUTE
. To change the
ALARM MODE
, press the selection of choice.